First law internal energy change
A gas in a heat-engine design review receives heat \(500\,\text{J}\) and does work \(240\,\text{J}\) on the surroundings. Calculate the change in internal energy. Use the diagram first, then calculate the requested value. Enter the numerical result and choose the interpretation that matches the physics meaning.
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Worked practice: physics data and result
Read the physical quantities first, then calculate the result and state what it means.